CVE-2026-2100Network attack vector

Remote application crash via uninitialized derive parameters

Published Mar 26, 2026 · Updated Aug 25, 2026

NULL pointer dereference in p11-kit 0.25.6 through 0.26.1 allows remote attackers to crash RPC client applications via C_DeriveKey. The IBM Kyber and IBM BTC parameter decoders in rpc-message.c leave data uninitialized when specific returned buffers are NULL, then copy or assign that value. Exploitation requires access to a remote token and a crafted call using an affected IBM mechanism; the demonstrated consequence is application-level denial of service.

CVSS severity5.3
Medium
EPSS probability1.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in p11-kit 0.25.6 through 0.26.1 allows remote attackers to crash RPC client applications via C_DeriveKey. The IBM Kyber and IBM BTC parameter decoders in rpc-message.c leave data uninitialized when specific returned buffers are NULL, then copy or assign that value. Exploitation requires access to a remote token and a crafted call using an affected IBM mechanism; the demonstrated consequence is application-level denial of service.

The record

CVE
CVE-2026-2100
Published
Mar 26, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-824, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-824Access of Uninitialized Pointer
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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